10-chloro-6-ethyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6H-benzo[5,6][1,3]oxazino[3,4-a]indole

10-chloro-6-(3,5-dimethoxyphenyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6H-benzo[5,6][1,3]oxazino[3,4-a]indole

3-bromo-10,12-dichloro-6-(3-methoxyphenyl)-6H-benzo[5,6][1,3]oxazino[3,4-a]indole

3-bromo-10-chloro-6-(3-fluoro-5-methoxyphenyl)-6H-benzo[5,6][1,3]oxazino[3,4-a]indole